Identification of the reduced dynamics of a physical flexible three-beam structure

Georgiou, IT

dc.contributor.author	Georgiou, IT	en
dc.date.accessioned	2014-03-01T02:52:41Z
dc.date.available	2014-03-01T02:52:41Z
dc.date.issued	2010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35998
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77953756063&partnerID=40&md5=2befcbdd1db5227a1a48e0f545a4bdf2	en
dc.subject.other	Acceleration fields	en
dc.subject.other	Beam structures	en
dc.subject.other	Dimension reduction	en
dc.subject.other	Normal modes of vibration	en
dc.subject.other	Reduced dynamics	en
dc.subject.other	Rigid motions	en
dc.subject.other	Single sensor	en
dc.subject.other	Slow dynamics	en
dc.subject.other	Spatio-temporal database	en
dc.subject.other	Time-scales	en
dc.subject.other	Vertical beams	en
dc.subject.other	Database systems	en
dc.subject.other	Flow fields	en
dc.subject.other	Prestressed beams and girders	en
dc.subject.other	Rigid structures	en
dc.subject.other	Sensors	en
dc.subject.other	Dynamics	en
dc.title	Identification of the reduced dynamics of a physical flexible three-beam structure	en
heal.type	conferenceItem	en
heal.publicationDate	2010	en
heal.abstract	An experimental spatiotemporal database for the free dynamics of the local transverse acceleration field of a flexible three-beam structure is created by employing a single sensor. A POD-based dimension reduction reveals that the database is dominated by a single POD mode with slow dynamics and a shape that reflects the acceleration discontinuities at the right corners of the structure. This mode interacts with the second POD mode with dynamics evolving at a relatively faster time scale. In the long time term, the dominant POD mode is dominated by a single harmonic indicating that the dynamics have entered a reduced subspace containing only slow dynamics. The dominant POD mode as well as the second one of the database generated by a relocating sensor seems to be related to normal modes of vibration. The shape of the dominant POD mode reveals the dominant physics of the specific three-beam structure: the cantilevered beam moves in its first mode while the horizontal and the other vertical beams perform a near rigid motion. This should be true for a wide rage of three-beam structures. Copyright © 2009 by ASME.	en
heal.journalName	Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference 2009, DETC2009	en
dc.identifier.volume	4	en
dc.identifier.issue	PART C	en
dc.identifier.spage	1705	en
dc.identifier.epage	1713	en